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American Standard Recommended Practice For Drainage of Coal Mines (M6.1-1955, UDC 622.5). (Revision of American Recommended Practice For Drainage of Coal Mines, M6-1931.).

United States. Bureau of Mines

Published: 1955

Total Pages: 17

American Standard Recommended Practice for Drainage of Coal Mines (M6.1-1955, UDC 622.5)

American Standards Association

Published: 1956

Total Pages: 448

American Standard Recommended Practice for Drainage of Coal Mines

American Standards Association

Published: 1957

Total Pages: 18

American Standard Recommended Practice for Drainage of Coal Mines (m6.1-1955, Udc 622.5).

Published: 1957

Total Pages: 18